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- D. W. HENDRICKSON.

Blast Furnace.

No. 64.0.12. Patented April 23. 1867.

NJETERS, PH010-LITHOGRAPHER WASHINGTON D c p @Mish tstrs @anni ffies.

DAVID W. HENDBIG'KSON, 0F NEW YQBK, N. Y.

Letters Patent No. 64,012, @lattea April Q3, 1867.

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To ALL WHoM IT MAY ooN'oERN:

`Be it known that I, DAVID W. HENDRIGKSON, of the city, county, and State of New York, have invented certain novel and useful Improvements in Blast or Cupola Furnaces; and I hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, which arelettered to correspond vWith and form a part of the specification.

In order that the public may fully understand the nature of my invention, and those skilled in the construction of blast furnaces be enabled to build the same, I will describe it as follows, to Wit:

Figure 1, letter A, is a steam boiler placed upon and forming apart of the top of the blastfurnace F. This boiler is heated by the fire in the furnace F, assisted by means of the pipes rl d, which distribute the heat through the water in the boiler A. The pipesl 2 3 4 convey the steam from the upper section or steam-chauiber'of the boiler into the cupola o1' ue S to produce and keep up a draught, which is increased or diminished in proportion to the number of jets of steam admitted through the tubes l 2 3 4, which are regulated by the stop-,cocks c c,

arranged around the outsideof the boiler A. Pipes B B B B are employed to convey the steam from the boiler Y A to the bottom of the furnace through the hot walls thereof, by which means it (the steam) becomes superheated and constitutes a hot blast, which assists the draught of the 'furnace and thedesulphurizing of the ores. The boi-ler A is firmly secured to the top of the furnace F by means of the flange e e.

I am aware that steam has been employed to create and keep up a draught and for desulphurizing ores in the i manufacture of iron, but I am not aware of any application of a boiler at the top of a furnace arranged so that it constitutes and forms a part thereof, and provided with a series of tubes, arranged as shown in the accompany# ing drawings, for producing and keeping up the draught at the top and bottom of.a blast or cupola furnace.

Therefore, what I claim as novel and useful, andfwhat I Wish to secure by Letters Patent of the United vStates of America, is-

The arrangement of the boi-ler A, hot-air tubes d and hot-blast pipes 1 2 8 4, B B B B, and stop-cocks c c, all substantially as described and shown in the accompanying drawings. l In testimony whereof I hereunto subscribe myname inY the presence of twowitnessesh A D. W. HEnnRioKsoN.

Witnesses:

JAMES P. MCLEAN, F. R. H. PRIEST. 

